I get the buzzing noise too. It just started and I think its the passenger windshield wiper vibrating. I asked a person who had one and he said he took it to the dealership and they adjusted the wiper. Hope so. Its annoying.
I am having the same issue. It worked for weeks then wouldn't work on I-95 in Florida but later worked on the turnpike. However, the next day it wouldn't work anywhere on the trip.
That happened to me after I took it to the dealership to have package lights installed. They wouldn't admit they caused the problem but ended up keeping the truck for 3 weeks and replaced the battery. It only had 2,000 miles at the time.